Welcome to MTV's Harry Potter World Cup! We've selected 64 of the best "Harry Potter" characters and matched them up in a series of duels for a chance at magical glory, but it's up to YOU to decide who the greatest "Potter" character of all time is in this pool of wizards and witches. Will the Death Eaters destroy Hogwarts, or will good triumph over evil? In the end, the choice is yours, so keep voting at MTV Movies Blog and make your voice heard!

Do you smell that? Smells like... villainy! That's because it's Day Four of the Harry Potter World Cup and duels are now underway in Diagon Alley, the division that hosts some of the tournament's most wicked witches and sadistic sorcerers.

The day kicks off with the number one seed, Draco Malfoy, a villain so notorious that he's been honored with the Best Villain award at the MTV Movie Awards for two years straight. One might assume that he'll easily cut through his first round opponent, but the road ahead could be tougher than both he and you imagine. At the same time, a duel between two old rivals rounds out today's first set of polls, which close at midnight on Sunday (June 27).

(1) Draco Malfoy vs. (16) Peeves the Poltergeist
He's been Harry Potter's numero uno rival (in the same peer group, at least) since they both arrived at Hogwarts oh so many years ago. Since then, the tension between Draco and Harry has only thickened — which is exactly why the son of Lucius and Narcissa Malfoy is so eager to beat the snot out of Peeves: so he can advance far enough to squash the Boy Who Lived all on his own. Can Peeves, a poltergeist who never appeared in the "Potter" films despite his popularity amongst the book-reading crowd, stand a chance against Malfoy's malice? Or will Draco's signature arrogance cost him the big game before he's barely even started?

(8) Viktor Krum vs. (9) Fleur Delacour
Though they lost the Triwizard Tournament years ago, they're both getting another shot at a different cup today. But only one of these two "Goblet of Fire" veterans can move on to the next round. Will it be Bulgarian wizard Viktor Krum, the Quidditch World Cup favorite and pride of Durmstrang? Or will Fleur Delacour, the swoon-worthy Beauxbatons babe and eventual Weasley-in-law, win the day? More so than many of the other first round match-ups, the outcome of this battle between Viktor and Fleur is truly up in the air.